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2542 full-text articles. Page 1 of 47.

Potential Impacts Of Climate Change On U.S. Transportation, William J. Gutowski Jr., H. G. Schwartz, A. C. Clark, G. E. Dickey, G. C. Eads, R. E. Gallamore, G. Giuliano, R. H. Iwasaki, K. H. Jacob, T. R. Karl, R. J. Lempert, L. Paiewonsky, S. G. H. Philander, C. R. Zeppie 2017 Iowa State University

Potential Impacts Of Climate Change On U.S. Transportation, William J. Gutowski Jr., H. G. Schwartz, A. C. Clark, G. E. Dickey, G. C. Eads, R. E. Gallamore, G. Giuliano, R. H. Iwasaki, K. H. Jacob, T. R. Karl, R. J. Lempert, L. Paiewonsky, S. G. H. Philander, C. R. Zeppie

William J. Gutowski, Jr.

No abstract provided.


Using Historic Pavement Performance Data To Identify And Select Sites For Asphalt Mixture Design Studies, Allyson Richey 2017 University of Arkansas, Fayetteville

Using Historic Pavement Performance Data To Identify And Select Sites For Asphalt Mixture Design Studies, Allyson Richey

Civil Engineering Undergraduate Honors Theses

Since 1997 Arkansas asphalt mixtures have been designed using a procedure commonly known as ‘Superpave’. In a traditional Superpave mix design, the design considers only traditional volumetric parameters; however, recent advances in mix design technology emphasize mixture’s ability to perform in its environment. There are numerous factors which affect the performance characteristics of an asphalt mix. Certainly, the asphalt binder’s performance is a critical variable in this system. Asphalt binders are sensitive to temperature, so much so that their primary parameter on which they are recommended is a function of both temperature and the geographic latitude in which ...


A Comprehensive Data Driven Evaluation Of Wide Area Probe Data: Opportunities And Challenges., Yaw Okyere Adu-Gyamfi, Anuj Sharma, Skylar Knickerbocker, Neal R. Hawkins, Michael Jackson 2017 Iowa State University

A Comprehensive Data Driven Evaluation Of Wide Area Probe Data: Opportunities And Challenges., Yaw Okyere Adu-Gyamfi, Anuj Sharma, Skylar Knickerbocker, Neal R. Hawkins, Michael Jackson

Anuj Sharma

There is a growing desire, among transportation organizations and state DOTs, to consider augmenting traditional traffic data collection with probe - based services for expanded coverage under constrained budgets. The nature of traffic data collection with probes is however dramatically different from traditional traffic data collection techniques. This affects how the new technology is applied and used to solve current traffic problems such as traffic incident management and roadway performance assessment. The current paper summarizes the experiences and lessons learned while using probe data for traffic operations and safety management and makes recommendations on opportunities to maximize the use of probe ...


Countywide Bluetooth System: Use Cases & Performance Measures, Shaun Quayle 2017 Washington County

Countywide Bluetooth System: Use Cases & Performance Measures, Shaun Quayle

TREC Friday Seminar Series

Washington County has 124 permanent roadside Bluetooth readers, which passively and in an anonymous fashion collect travel time, speed, and origin-destination information across the major arterials in the urban County. This presentation gives an overview of the program purpose, history, some interesting use cases, and the formation of comparative performance metrics to gauge the magnitude and duration of congestion across the County. These metrics and information will help planners improve travel demand models, consultants improve traffic analyses, operations staff prioritize timing, detection, and maintenance functions, agencies inform traveler information data, and leaders better communicate the story of traffic demand, delay ...


Accelerated Innovation Deployment (Aid) Demonstration: Kytc — Roundabout Installation Project In London, Kentucky, Jeff Jasper, Adam J. Kirk 2017 University of Kentucky

Accelerated Innovation Deployment (Aid) Demonstration: Kytc — Roundabout Installation Project In London, Kentucky, Jeff Jasper, Adam J. Kirk

Kentucky Transportation Center Research Report

This document serves as the final report on the construction and opening of the Roundabout Project in London, Kentucky (Kentucky Item Number 11‐904.1). This project (hereafter referred to as the London Roundabout) was constructed on the authority of the Kentucky Transportation Cabinet (KYTC), which received an Accelerated Innovation Deployment (AID) Demonstration grant of $1 million to offset project construction costs. The AID Demonstration program requires that award recipients submit a final report to the Federal Highway Administration (FHWA) within six months of project completion. The purpose of this report is to document the project delivery and construction processes ...


Webinar: Transportation Benefits Of Parking Cash-Out, Pre-Tax Commuter Benefits, And Parking Surtaxes, Allen Greenberg, James Choe, Sonika Sethi, Colleen Stoll 2017 Federal Highway Administration

Webinar: Transportation Benefits Of Parking Cash-Out, Pre-Tax Commuter Benefits, And Parking Surtaxes, Allen Greenberg, James Choe, Sonika Sethi, Colleen Stoll

TREC Webinar Series

The vast majority of employers provide their employees free parking at work, which encourages employees to drive alone. Multiple strategies exist to level the playing field between travel modes and allow employees to select the travel option most beneficial to them without suffering a financial penalty. The U.S. Department of Transportation, Federal Highway Administration sponsored a study to understand the effect parking cash out, pre-tax commuter benefits, and parking surtaxes can have on congestion, emissions, and other driving-related externalities. The study is part of the Administration’s ongoing efforts to increase awareness of solutions to address the transportation issues ...


Advisory Bike Lanes In North America, Michael Williams 2017 Portland State University

Advisory Bike Lanes In North America, Michael Williams

TREC Friday Seminar Series

Despite being used successfully for decades in Europe, Advisory Bike Lanes are an emerging facility type in North America and can be an effective tool for communities wishing to provide bicycle lanes on streets that are otherwise too narrow to accommodate them. This talk will introduce the concept and operation of advisory bike lanes and look at some lessons learned from the early installations of this facility in the U.S. and Canada.


Drones For Commercial Last-Mile Deliveries: A Discussion Of Logistical, Environmental, And Economic Trade-Offs, Miguel Figliozzi 2017 Portland State University

Drones For Commercial Last-Mile Deliveries: A Discussion Of Logistical, Environmental, And Economic Trade-Offs, Miguel Figliozzi

Miguel A. Figliozzi

There are no studies that model the potential effectiveness of Unmanned Aerial Vehicles (UAVs) or drones to reduce CO2e lifecycle (including both utilization and vehicle phase) emissions when compared to conventional diesel vans, electric trucks, electric vans, and tricycles. This study presents a novel analysis of lifecycle UAV and ground commercial vehicles CO2e emissions.


Safety Effectiveness Of Pedestrian Crossing Treatments, Christopher Monsere 2017 Portland State University

Safety Effectiveness Of Pedestrian Crossing Treatments, Christopher Monsere

Christopher M. Monsere

Over the last decade, the transportation agencies in Oregon have systematically enhanced many pedestrian crossings at mid-block locations with Rectangular Rapid Flashing Beacons (RRFBs), Flashing Yellow Beacons (Flash), and high visibility crosswalk markings (Hi-Vis). Enhancements often included the installation of refuge medians. This study explored the safety performance of these enhanced crossings, categorized by enhancement type. Data were collected on 191 crossings that included installation year, geometric features, surrounding land use, traffic volumes, and the number of crashes. Because pedestrian volume at the locations was unavailable, a pedestrian activity level variable was developed. Target crashes for analysis were identified as ...


Safety Effectiveness Of Pedestrian Crossing Treatments, Christopher Monsere 2017 Portland State University

Safety Effectiveness Of Pedestrian Crossing Treatments, Christopher Monsere

TREC Friday Seminar Series

Over the last decade, the transportation agencies in Oregon have systematically enhanced many pedestrian crossings at mid-block locations with Rectangular Rapid Flashing Beacons (RRFBs), Flashing Yellow Beacons (Flash), and high visibility crosswalk markings (Hi-Vis). Enhancements often included the installation of refuge medians. This study explored the safety performance of these enhanced crossings, categorized by enhancement type. Data were collected on 191 crossings that included installation year, geometric features, surrounding land use, traffic volumes, and the number of crashes. Because pedestrian volume at the locations was unavailable, a pedestrian activity level variable was developed. Target crashes for analysis were identified as ...


Datumate, Purdue ECT Team 2017 Construction Engineering & Management, Purdue University

Datumate, Purdue Ect Team

ECT Fact Sheets

Datumate is digitally transforming civil engineering processes used in construction, surveying and infrastructure inspection markets with fully automated, highly precise, cost effective and safe tools. It utilizes state-of-the-art image processing and advanced drones and camera technologies dramatically reducing the amount of time surveying crews spend in the field, speeding up construction progress checks and shortening infrastructure inspection duration, while maintaining survey grade accuracy. The intuitive, simple and automated solutions increase productivity by saving field and office time in civil engineering and inspection projects of roads, intersections, stockpile volumes, topography, piping, industrial facilities, bridges, property surveys, building facades, railways, cellular infrastructure ...


Snow And Ice Removal Route Optimization In Kentucky, Benjamin L. Blandford, Erin Lammers, Eric R. Green 2017 University of Kentucky

Snow And Ice Removal Route Optimization In Kentucky, Benjamin L. Blandford, Erin Lammers, Eric R. Green

Benjamin L. Blandford

Each year the Kentucky Transportation Cabinet (KYTC) spends $40-$80 million removing snow and ice from the state’s roadways. Snow and ice removal are accomplished through a system of snow and ice removal routes that are designed to account for location and the attributes of trucks, facilities, materials, and roadways. To identify strategies that will improve and optimize KYTC’s snow and ice removal operations, Kentucky Transportation Center (KTC) researchers used ArcGIS and its Network Analyst extension to study the performance of the Cabinet’s current routing procedures. Building from this investigation, researchers developed optimized snowplow routings for four ...


Snow And Ice Removal Route Optimization In Kentucky, Benjamin L. Blandford, Erin Lammers, Eric R. Green 2017 University of Kentucky

Snow And Ice Removal Route Optimization In Kentucky, Benjamin L. Blandford, Erin Lammers, Eric R. Green

Eric R. Green

Each year the Kentucky Transportation Cabinet (KYTC) spends $40-$80 million removing snow and ice from the state’s roadways. Snow and ice removal are accomplished through a system of snow and ice removal routes that are designed to account for location and the attributes of trucks, facilities, materials, and roadways. To identify strategies that will improve and optimize KYTC’s snow and ice removal operations, Kentucky Transportation Center (KTC) researchers used ArcGIS and its Network Analyst extension to study the performance of the Cabinet’s current routing procedures. Building from this investigation, researchers developed optimized snowplow routings for four ...


2017 Safety Belt Usage Survey In Kentucky, Kenneth R. Agent, Eric R. Green, Erin Lammers 2017 University of Kentucky

2017 Safety Belt Usage Survey In Kentucky, Kenneth R. Agent, Eric R. Green, Erin Lammers

Eric R. Green

The use of safety belts and child safety seats is a proven means of reducing injuries to motor vehicle occupants involved in traffic crashes. The objective of the survey summarized in this report was to establish a statewide safety belt usage rate in Kentucky for 2017. This rate can be compared to those determined from previous surveys. The 2017 statewide survey documents the continued increase in usage associated with the change in the law to allow primary enforcement and related education and enforcement.


Safety Concepts For Workers From An Osha Perspective, Zamaan Al-shabbani, Roy E. Sturgill Jr., Gabriel B. Dadi 2017 University of Kentucky

Safety Concepts For Workers From An Osha Perspective, Zamaan Al-Shabbani, Roy E. Sturgill Jr., Gabriel B. Dadi

Kentucky Transportation Center Research Report

Highway construction and maintenance workers face numerous hazards on job sites, many of which are unique by industry standards. Despite the exposure of state transportation agency employees and contractors to these hazards, there are few safety standards, regulations, programs that directly target the sector aimed at prevention and mitigation. To help the Kentucky Transportation Cabinet (KYTC) improve employee safety, researchers at the Kentucky Transportation Center (KTC) analyzed the frequency and causes of workplace injuries for 10 essential Cabinet maintenance operations. Most incidents were attributable to human factors or ergonomics. Based on this analysis, the leading causes of incidents, and a ...


Active Traffic Management Case Study: Phase 1, Anuj Sharma, Shuo Wang, Aemal Khattak 2017 Iowa State University

Active Traffic Management Case Study: Phase 1, Anuj Sharma, Shuo Wang, Aemal Khattak

Anuj Sharma

This study developed a systematic approach for using data from multiple sources to provide active traffic management solutions. The feasibility of two active traffic management solutions is analyzed in this report: ramp-metering and real-time crash risk estimation and prediction. Using a combined dataset containing traffic, weather, and crash data, this study assessed crash likelihood on urban freeways and evaluated the economic feasibility of providing a ramp metering solution. A case study of freeway segments in Omaha, Nebraska, was conducted. The impact of rain, snow, congestion, and other factors on crash risk was analyzed using a binary probit model, and one ...


Safety And Operational Analysis Of Lane Widths In Mid-Block Segments And Intersection Approaches In The Urban Environment In Nebraska, Anuj Sharma, Wei Li, Mo Zhao, Laurence Rilett 2017 Iowa State University

Safety And Operational Analysis Of Lane Widths In Mid-Block Segments And Intersection Approaches In The Urban Environment In Nebraska, Anuj Sharma, Wei Li, Mo Zhao, Laurence Rilett

Anuj Sharma

This research examined the safety and operational effects of roadway lane width on mid-block segments between signalized intersections as well as on signalized intersection approaches in the urban environments of Lincoln and Omaha, Nebraska. In the safety analysis, the Poisson and negative binomial regressions with fixed or random parameters were estimated to evaluate the effects of lane width on annual crash frequencies at mid-block segments and intersection approaches. In the operational analysis, linear regressions were used to examine lane width effects on the vehicles’ speed at mid-block segments. The Kolmogorov-Smirnov test was applied to explore the effects of lane width ...


Examining Accident Reports Involving Autonomous Vehicles In California, Francesca Favaro, Nazanin Nader, Sky Eurich, Michelle Tripp, Naresh Varadaraju 2017 San Jose State University

Examining Accident Reports Involving Autonomous Vehicles In California, Francesca Favaro, Nazanin Nader, Sky Eurich, Michelle Tripp, Naresh Varadaraju

Faculty Publications

Autonomous Vehicle technology is quickly expanding its market and has found in Silicon Valley, California, a strong foothold for preliminary testing on public roads. In an effort to promote safety and transparency to consumers, the California Department of Motor Vehicles has mandated that reports of accidents involving autonomous vehicles be drafted and made available to the public. The present work shows an in-depth analysis of the accident reports filed by different manufacturers that are testing autonomous vehicles in California (testing data from September 2014 to March 2017). The data provides important information on autonomous vehicles accidents’ dynamics, related to the ...


Examining Accident Reports Involving Autonomous Vehicles In California, Francesca M. Favaro, Nazanin Nader, Sky O. Eurich, Michelle Tripp, Naresh Varadaraju 2017 San Jose State University

Examining Accident Reports Involving Autonomous Vehicles In California, Francesca M. Favaro, Nazanin Nader, Sky O. Eurich, Michelle Tripp, Naresh Varadaraju

Francesca M. Favarò

Autonomous Vehicle technology is quickly expanding its market and has found in Silicon Valley, California, a strong foothold for preliminary testing on public roads. In an effort to promote safety and transparency to consumers, the California Department of Motor Vehicles has mandated that reports of accidents involving autonomous vehicles be drafted and made available to the public. The present work shows an in-depth analysis of the accident reports filed by different manufacturers that are testing autonomous vehicles in California (testing data from September 2014 to March 2017). The data provides important information on autonomous vehicles accidents’ dynamics, related to the ...


Drones For Commercial Last-Mile Deliveries: A Discussion Of Logistical, Environmental, And Economic Trade-Offs, Miguel Figliozzi 2017 Portland State University

Drones For Commercial Last-Mile Deliveries: A Discussion Of Logistical, Environmental, And Economic Trade-Offs, Miguel Figliozzi

Civil and Environmental Engineering Faculty Publications and Presentations

There are no studies that model the potential effectiveness of Unmanned Aerial Vehicles (UAVs) or drones to reduce CO2e lifecycle (including both utilization and vehicle phase) emissions when compared to conventional diesel vans, electric trucks, electric vans, and tricycles. This study presents a novel analysis of lifecycle UAV and ground commercial vehicles CO2e emissions.


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